GB795779A - Improvements in or relating to the treating of surfaces for discontinuities - Google Patents

Improvements in or relating to the treating of surfaces for discontinuities

Info

Publication number
GB795779A
GB795779A GB2908255A GB2908255A GB795779A GB 795779 A GB795779 A GB 795779A GB 2908255 A GB2908255 A GB 2908255A GB 2908255 A GB2908255 A GB 2908255A GB 795779 A GB795779 A GB 795779A
Authority
GB
United Kingdom
Prior art keywords
water
penetrant
emulsifying agent
agent
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2908255A
Inventor
Robert Charles Switzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Switzer Brothers Inc
Original Assignee
Switzer Brothers Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Switzer Brothers Inc filed Critical Switzer Brothers Inc
Priority to GB2908255A priority Critical patent/GB795779A/en
Priority to US553166A priority patent/US2953530A/en
Publication of GB795779A publication Critical patent/GB795779A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

795,779. Detecting surface flaws. SWITZER BROS., Inc. Sept. 24, 1956 [Oct. 12, 1955], No. 29082/55. Class 106 (2). [Also in Group XL (a)] A testing agent for use in detecting surface flaws in test bodies comprises a dye dispersed in a flaw-penetrating liquid selected from the class consisting of polyoxyalkylene glycols and aliphatic mono- and di-ethers thereof. If the liquid chosen is a water-immiscible one there may be added to this liquid one or both of the following: (a) a water-immiscible diluent such as a hydrocarbon oil penetrant, for example kerosene, and (b) an oil-soluble emulsifying agent, such as petroleum sulphonate or any of a wide range of soaps or detergents. The emulsifier may include a coupling agent which will assist the emulsifying agent in coupling a washing water with the oil constituent of the liquid to form an emulsion which will strip off the penetrant from the surface being inspected. The coupling agent is preferably a glycol, for example ethylene glycol. If the flow-penetrating liquid chosen is one miscible with water, water or a water-miscible organic extender may be used as the diluent and the emulsifying and coupling agents omitted. A water-immiscible penetrant can be used without an emulsifying agent where the emulsifying agent is incorporated in the wash water used for washing the penetrant from the surface of a body coated therewith or where the emulsifying agent is applied over the penetrant coated body by spraying or dipping before washing the penetrant from the surface of the article. The dye may be a non-fluorescent colour material or one containing a fluorescent dye responsive to ultraviolet light. Examples of suitable fluorescent dyes are quoted and the use of polyoxyalkylene glycols is stated to enhance the brightness of the fluoragent. Specifications 642,402, [Group XL (a)], 684,021 and U.S.A. Specification 2,259,400 are referred to.
GB2908255A 1955-10-12 1955-10-12 Improvements in or relating to the treating of surfaces for discontinuities Expired GB795779A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2908255A GB795779A (en) 1955-10-12 1955-10-12 Improvements in or relating to the treating of surfaces for discontinuities
US553166A US2953530A (en) 1955-10-12 1955-12-14 Method and compositions for detecting flaws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2908255A GB795779A (en) 1955-10-12 1955-10-12 Improvements in or relating to the treating of surfaces for discontinuities

Publications (1)

Publication Number Publication Date
GB795779A true GB795779A (en) 1958-05-28

Family

ID=10285871

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2908255A Expired GB795779A (en) 1955-10-12 1955-10-12 Improvements in or relating to the treating of surfaces for discontinuities

Country Status (1)

Country Link
GB (1) GB795779A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9310315B2 (en) 2007-12-17 2016-04-12 Life Technologies Corporation Methods for detecting defects in inorganic-coated polymer surfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9310315B2 (en) 2007-12-17 2016-04-12 Life Technologies Corporation Methods for detecting defects in inorganic-coated polymer surfaces

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